Red and black Dura-Slide premium quality vacuum hose. Crush resistant construction with an inner lining that promotes free air movement and drastically reduces the chance that dirt particles get trapped inside the hose. 15' long, 1 1/2" inner diameter. The outer ridges are red and the recessed grooves are black.
https://www.kleen-ritecorp.com/p-69865-kleen-rite-dura-slide-red-and-black-15-ft-x-1-1-2-in-premium-vacuum-hose.aspx